<?php

function pingServer($hostname, $port) {
    $sock = socket_create(AF_INET, SOCK_STREAM, getprotobyname("tcp"));
    if (!$sock)
        return false;
    if (!@socket_connect($sock, $hostname, $port)) {
        error_log("Failed to connect to ${hostname}:${port}");
        return false;
    }
    socket_close($sock);
    return true;
}

if (isset($_GET["command"])) {
    switch ($_GET["command"]) {
    case "version":
        $fic = substr(file_get_contents("./.git/HEAD"), 5);
        if ($fic === FALSE) {
            header("HTTP/1.1 500 Server error");
            break;
        }
        $fic = file_get_contents("./.git/".trim($fic));
        if ($fic === FALSE) {
            header("HTTP/1.1 500 Server error");
            break;
        }
        echo json_encode(trim($fic));
        break;

    case "servers":
        require_once("./inc/servers.php");
        echo json_encode(getServers());
        break;

    case "channels":
        require_once("./inc/channels.php");
        echo json_encode(getChannels());
        break;

    case "ping":
        require_once("./.htconfig.php");
        require_once("inc/servers.php");
        if (!isset($_GET["key"]) || $_GET["key"] !== API_KEY) {
            $state = getServersState();
            if (!$state) {
                header("HTTP/0.0 500 Internal Server Error");
                die;
            }
            echo json_encode($state);
            die;
        }
        require_once("./inc/servers.php");
        $result = [];
        foreach (getServers() as $i => $attrs) {
            $success = false;
            foreach ($attrs["ports"] as $port => $unused) {
                if (pingServer($i, $port)) {
                    $success = true;
                    break;
                }
            }
            $result[$i] = $success;
        }
        $result = array(
            "result" => $result,
            "date" => time()
        );
        writeServersState($result);
    }
}

?>